In an interview with Fortune, Cook claimed that Apple Watch has saved "a not insignificant number" of lives after users brought their heart rate data to their doctor before it was too late.

Apple's new Apple Watch 3, with a swathe of new capabilities including built-in cellular, is expected to stoke the smartwatch market. The LTE model of the Apple Watch is notable by the red accent on the Digital Crown.

As such, all of this information is all part of the Apple Heart Study.

Apple Watch is the Number One Watch in the World

Apple hasn't made an official announcement about specific Apple Watch and heart related projects.

"We're adding smart activity coaching, a completely redesigned workout app, new features for swimmers". Other new watch faces include a "kaleidoscope" design and Toy Story characters Woody, Jessie, and Buzz designs.

The study uses data from the Apple Watch to analyze arrhythmias, and the company has been working closely with the FDA to organize this entire endeavor.

This technology needs to be built into gym machines, which means manufacturers like Life Fitness will need to update existing machines and create new ones. A source told CNBC the clinical study involving the Apple Watch is set to begin later this year. As such, the optical heart rate monitor is ahem at the heart of watchOS 4. The trickle-down will take time, so you may not see an Apple Watch-compatible machine in your local gym immediately.

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President Donald Trump threatened that the United States will rain "fire and fury" upon North Korea if it is to attack. The move comes in the wake of the North's sixth and most powerful nuclear detonation test on September 3.

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Trump later head to the Pentagon, where the president made remarks honoring the victims of the attack in Washington, D.C. Trump, a New York City native, was in Manhattan when the Twin Towers fell 16 years ago.